2021CET-4最后模拟试题

1、2021CET-4最后模拟试题2010年6月年夜教英语4级测验考前最初一套摹拟题Part I Writing (30 minutes)Directions: For this part, you are allowed 30 minutes to write a composition on the topic: Styles of Living. You should write at least 120 words following the outline given below in Chinese:1. 有些人乐意以及女母寓居正在一同2. 有些人念本人自力寓居3. 我的瞧法Style

2、s of LivingPart II Reading Comprehension (Skimming and Scanning) (15 minutes)Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, markY (for YES) if the statement agrees with the information given in the pass

3、age;N (for NO) if the statement contradicts the information given in the passage;NG (for NOT GIVEN) if the information is not given in the passage.How Ice Cream WorksThe U.S. ice cream industry sells about a million gallons of ice cream each year, dispensing cones, gallons, pints, sundaes and other

4、desserts through grocery stores and ice cream shops. In fact, eight percent of all the milk produced in the U.S. ends up in a frozen dairy product.Ice Cream or Frozen Dessert?Not just any frozen treat can be called ice cream. In fact, the U.S. Department of Agriculture has specific rules that define

5、 what can and cant be labeled ice cream. To bear the Meets USDA Ingredient Standard for Ice Cream stamp, it has to contain at least 10 percent milk fat, and a minimum of six percent non-fat milk solids. A gallon has to weigh at least 4.5 pounds.The range of milk fat (sometimes referred to as butter

6、fat) used in ice cream can go from the minimum 10 percent to a maximum of about 16 percent. Most premium ice creams use 14 percent milk fat. Higher fat content leads to better, richer taste and a creamier texture. Ice cream makers dont go higher than 16 percent because it would be costly and very hi

7、gh in calories. An ice cream with this much milk fat would also taste so rich that people would probably eat it in smaller amounts, which would be bad news for people who sell ice cream for a living.Other frozen desserts, such as sorbets (果汁冰糕), low-fat ice cream, and frozen yogurt, are not technica

8、lly ice cream at all. Frozen custard is ice cream that has at least 1.4 percent egg yolk solids, and soft serve can be any frozen milkbased dessert that has not gone through the hardening processmore on that later.In terms of specific ingredients, the recipe for ice cream is simple. But in scientifi

9、c terms, its complicated stuff. Ice cream is a colloid, a type ofemulsion(乳状液). An emulsion is a combination of two substances that dont normally mix together. Instead, one of the substances is dispersed throughout the other. In ice cream, molecules of fat are suspended in a water-sugar-ice structur

10、e along with air bubbles. The presence of air means that ice cream is also technically a foam.In addition to milk fat, non-fat milk solids, sugar, and air, ice cream also contains stabilizers and emulsifiers. Stabilizers help hold the air bubble structure together and give the ice cream a better tex

11、ture. Although gelatin(凝胶) was originally used as a stabilizer, xanthan gum, guar gum, and other compounds are used today. Emulsifiers keep the ice cream smooth and aid the distribution of the fat molecules throughout the colloid. Egg yolks were once used, but ice cream manufacturers now tend to use

12、 other chemical compounds. These stabilizers and emulsifiers make up a very small proportion (less than one percent) of the ice cream.Making Ice CreamWhether its being made in your kitchen with a hand crank, at a local homemade ice cream shop with a stand-alone ice cream maker, or in a factory that

13、cranks out thousands of gallons of ice cream every day, the process of making ice cream is basically the same. The only difference is the scale of the operation.First, you need ice cream mix. You can buy commercially made ice cream mix that is set to a certain milk fat content. Ice cream factories u

14、sually make their own mix by combining milk, cream and sugar in a 3,000 gallon vat, with the proportions and mixing controlled by computers. The mix is then pasteurized(用巴氏法灭菌), or heated, to kill any harmful bacteria. If you were to make your own mix at home, you could pasteurize it by cooking it i

15、n a doubleboiler, or use an egg substitute or pasteurized egg product. This step is important because otherwise people who eat your homemade ice cream could get sick due to salmonella contamination. According to the Centers for Disease Control, those most at risk include the elderly, very young chil

16、dren, and people with compromised immune systems.The next step in production is adding flavor to the mix. There are thousands of varieties of ice cream, so just about any combination of flavors is possible. From vanilla to cinnamon, chocolate to triple chocolate fudge brownie, it all gets blended in

17、to the ice cream mix. In a factory, this step takes place in vats that hold hundreds of gallons of ice cream, while giant steel paddles do the mixing. In your kitchen, a large bowl and a food mixer will work, or even a wooden spoon and muscle power if you want some exercise. Solid chunks such as pie

18、ces of fruit, chocolate chunks, marshmallows, and candy are added later.The next step is where and ice cream making machine comes into play. The mix has to be simultaneously frozen and whipped. In a factory, this happens in a giant tube surrounded by pipes. The pipes contain chemicals such as ammoni

19、a that freeze the tube, but the ammonia never comes into contact with the ice cream. The ice cream mix is pumped through the tube, where it gets cold very quickly. A dasher, or blade, turns inside the tube. This whips the mixture, introducing the air bubbles that help give ice cream its structure. T

20、he dasher also scrapes the sides of the tube, clearing off ice crystals that form there. This prevents large ice crystals from ruining the flavor and texture of the ice cream. All the elements of this process are carefully monitored and controlled by computers. Most homemade ice cream shops use a ba

21、tch freezer for this step, where the same process happens on a smaller scale.This step can be accomplished at home with a rock salt/ice mixture forfreezing and a hand or electric cranked dasher to mix and scrape off the ice crystals.Once the ice cream has come out of the ice cream maker, the process

22、 isnt finished. At this point, the mixture is frozen, but still soft. Large chunks of candy and other goodies are now added. Then the ice cream is placed into containers. Factory machines pour it straight into cartons or buckets, or it can be extruded(挤压出)into shapes that have wooden sticks placed i

23、nto them for individual treats.Now the ice cream needs to be reduced to a very low temperature, zero degrees Fahrenheit or below. Factories make it even colder since they need the ice cream to stay frozen while it is packaged and loaded onto trucks. It needs to be very cold to freeze the ice cream q

24、uickly and prevent the formation of large ice crystals. This process is known as hardening. Soft-serve is often simply ice cream that has not gone through this process.Well learn about the ice cream industry in the next section.Ice Cream IndustryIn 1999, retail sales of ice cream in the U.S., the wo

25、rldwide leader in ice cream production, topped $4 billion. In 2002, more that $20 billion was spent on frozen desserts. The leading states in ice cream consumption are California, Indiana, Pennsylvania, Texas and New York . Americans ate an average of 21.5 quarts of ice cream per person in 2004.With

26、 that much money to be made, the ice cream industry can be secretive and underhanded(奥密的). Deborah Hanny, owner of Sweet Jennys Ice cream in Williamsville, NY, protects her recipes carefully. Her shophas been photographed by men in suits and she once caught someone in he upstairs office hurriedly tr

27、ying to copy down her recipes.Ice cream making secrets are seldom passed down from generation to generation these days. So where do people in the ice cream industry learn their craft? At ice cream school. Pennsylvania State University offers aweek-long Ice Cream Short Course intended for industry pr

28、ofessionals. The course teaches the science and technology used to make ice cream. The also offer Ice Cream 101 for ice cream hobbyists who just want to learn more about their favorite frozen treat. The University of Guelph, Ontarios Dairy Science and Technology school, also has a long history of te

29、aching ice cream science.1. Eight percent of all the milk produced in the U.S. ends up in a frozen dairy product. Y2. Any frozen treat can be called ice cream. N3. In addition to milk fat, non-fat milk solids, sugar, and air, ice cream also contains stabilizers and emulsifiers. Y4. The process of ma

30、king ice cream at home is different from that in a factory. N5. Once the ice cream has come out of the ice cream maker, the process is finished. N6. Ice cream making secrets are passed down from generation to generation these days. N7. Many universities in U.S.A. offer courses of ice cream science.

31、NG8. The range of milk fat used in ice cream can go _ from the minimum 10 percent to a maximum of about 16 percent _.9. In 1999, retail sales of ice cream in the U.S. topped _$4 billion_.10. With that much money to be made, the ice cream industry can be_secretive and underhanded _.Part III Listening

32、 Comprehension (35 minutes)Section ADirections: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each questi

33、on there will be a pause. During the pause, you must read the four choices marked A, B, Cand D, and decide which is the best answer. Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.11. A The class thought the demonstration was too complex.B Too many student

34、s showed up.C The professor didnt show up.D The professor cancelled it.12. A Because nine is an odd number.B Because the elevator got stuck.C Because the elevator is too old.D Because there are too many people in the elevator.13. A The rain has stopped.B She wants to soak her clothes.C She is lookin

35、g for her clothes.D Its raining heavily.14. A She goes home for lunch.B She spends her time shopping.C She gets interested in what she is reading.D She doesnt wake up in time.15. A To buy some potatoes.B To pass him some potatoes.C To have some potatoes.D to help him cook some potatoes.16. A It invo

36、lved a few lunches.B There were free lunches.C There were three lunches.D There were more than free lunches.17. A He decided to continue his project.B He was unable to get sufficient money.C Lack of land prevented his success.D He was successful with his project.18. A Painting the room white.B Buyin

37、g white furniture.C Waiting the man to decide.D Asking Mr. White for advice.Questions 19 to 22 are based on the conversation you have just heard.19. A In the student recreation center.B In the campus dining hall.C In the university bookstore.D In a classroom.20. A Studying.B Preparing snacks.C Playi

38、ng cards.D Learning how to play bridge.21. A Miss her card game.B Stay up too late.C Take too heavy a work load next semester.D Neglect her studies to play bridge.22. A He already knows how to play.B He doesnt like to play games.C He doesnt have a partner.D He doesnt have enough free time.Questions

39、23 to 25 are based on the conversation you have just heard.23. A The effect of the atmosphere on rainfall.B How conditions on earth support life.C How water originated on earth.D A new estimate of the age of earth.24. A The surface of the ocean is expanding.B Volcanic activity is increasing.C The su

40、rface of earth contains tons of cosmic dust.D Thousands of comets are colliding with earths atmosphere.25. A They are found under the oceans.B They were most active when earth was first formed.C Their emissions created earths atmosphere.D Their fumes are mostly water in the state of a gas.Section BD

41、irections: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, Cand D. Then mark the corre

42、sponding letter on Answer sheet 2 with a single line through the center.Passage OneQuestions 26 to 28 are based on the passage you have just heard.26. A He was trained as an electronics engineer.B He was trained as a mechanical engineer.C He was trained as a communication engineer.D He was trained a

43、s a nuclear engineer.27. A Fishing and hunting.B He began to show great interest in natural beauty.C Nuclear science.D Amateur radio.28. A An old friend of his.B His elder brother.C His younger brother.D his younger son.Passage TwoQuestions 29 to 31 are based on the passage you have just heard.29. A

44、 The Bachelors degree.B The Associate degree.C The Masters degree.D The Doctors degree.30. A A technical associate degree.B A degree which is designed for transfer.C A bachelors degree.D The last degree one can ever hope to attain.31. A 120 quarter hours.B 95 quarter hours.C 120 credit hours.D 72 cr

45、edit hours.Passage ThreeQuestions 32 to 35 are based on the passage you have just heard.32. A In 1848.B In 1846.C In 1884.D In 1849.33. A 8,000 people.B 10,000 people.C 80,000 people.D 100,000 people.34. A From the western United States.B From all parts of the country.C From only the east coast of t

46、he American Continent.D From San Francisco Bay.35. A Because many settlements were abandoned.B Because there were many gold-hungry sailors.C Because private gold could not be protected by law.D Because everybody raced for California.Section CDirections: In this section, you will hear a passage three

47、 times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you arerequir

48、ed to fill in the missing information. For these blank, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.Mark Twain, who wrote the story were going to r

49、ead, traveled quite a lot often because circumstamces, usually (36) _ circumstances, forced him to He was born in Florida, Missouri in 1835 and moved to Hannibal, Missouri with his family when he was about 4 years old. Most people think he was born in Hannibal but that isnt true. After his father di

50、ed when he was about 12, Twain worked in Hannibal for a while and then left, so he could (37) _ more money. He worked for a while as a typesetter on (38) _ newspapers and then got a job as a river (39) _ on the Mississippi. Twain loved this job and many of his books show it. The river job didnt last

51、, however, because of the (40) _ of the Civil War. Twain, was in the (41) _ Army for just 2 weeks and then he and his whole (42) _ went west to get away from the war and the army. In Nevada and California Twain (43) _ for silver and gold without much luck, but did succeed as a writer. (44)_ _. (45)_

52、 _. (46)_ _.Part IV Reading Comprehension (Reading in Depth) (25 minutes) Section ADirections: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully

53、 before making your choices. Each choice in bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the center. You may not use any of the words in the bank more than once.Questions 47 to 56 are based on the following passage.Pe

54、rhaps like most Americans you have some extra pounds to E. You may even have tried a fad diet or two, but found yourself right back where you started. The key to weight loss is regular F activity. And surprisingly, you dont have to give up eating or make the gym your second home to see long-term, A

55、effects.Your body needs a certain amount of energy to maintain basic H such as breathing, blood circulation and digestion. The energy required to keep your organs functioning is referred to as the resting or basal metabolic rate.Any time you are active, B energy is required. It is obtained from glyc

56、ogen and fat stored in the blood, liver, and muscles. The key to losing weight is to draw on the fat rather than on the carbohydrate reserves.Which of the two energy sources you use depends on the intensity and C of your activity. The higher the intensity, the more your body will pull from the store

57、d carbohydrates. The lower the intensity, the more your body will J on fat as its fuel.Aerobic exercise is most D for weight loss. When you perform aerobic activities you L contract large muscle groups such as your legs and arms. Walking, running, rollerblading, swimming, dancing, and jumping jacks are all forms of aerobic activity.Surprisingly, if your ae